/* ============================================================
   MENU MOBILE - INSTITUTO MANILKARA
   Botao hamburguer + menu lateral (drawer).
   A marcacao e injetada pelo /js/mobile-nav.js a partir do
   .menu que ja existe no header, entao este arquivo e o JS
   servem para todas as paginas sem mexer no HTML de cada uma.
   ============================================================ */

:root {
  --mnav-marrom: #8d3c1e;
  --mnav-cinza: #717171;
  --mnav-borda: #d7d7d7;
  --mnav-fundo: #f9f9f9;
  --mnav-breakpoint: 900px;
}

/* ---------- Botao hamburguer (escondido no desktop) ---------- */
.mnav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  cursor: pointer;
  background: none;
  border: none;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.mnav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background: var(--mnav-marrom);
  transition: transform 0.3s ease, opacity 0.2s ease;
}
/* Vira um "X" quando aberto */
.mnav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mnav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.mnav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Fundo escuro atras do drawer ---------- */
.mnav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 99998;
}
.mnav-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

/* ---------- Drawer lateral ---------- */
.mnav-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 280px;
  max-width: 82vw;
  background: var(--mnav-fundo);
  border-left: 1px solid var(--mnav-borda);
  box-shadow: -8px 0 24px rgba(0, 0, 0, 0.15);
  transform: translateX(100%);
  transition: transform 0.3s ease;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}
.mnav-drawer.is-open {
  transform: translateX(0);
}

.mnav-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--mnav-borda);
  flex-shrink: 0;
}
.mnav-drawer-header img {
  height: 40px;
  width: auto;
  object-fit: contain;
}
.mnav-close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 30px;
  line-height: 1;
  padding: 0 4px;
  color: var(--mnav-marrom);
}

.mnav-links {
  display: flex;
  flex-direction: column;
  padding: 8px 0 24px;
}
.mnav-links a {
  display: block;
  padding: 15px 24px;
  color: var(--mnav-cinza);
  font-family: "SourceSans3-SemiBold", sans-serif;
  font-size: 18px;
  font-weight: 600;
  text-decoration: none;
  border-left: 4px solid transparent;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.mnav-links a:hover,
.mnav-links a:focus-visible {
  background: #f0f0f0;
  color: var(--mnav-marrom);
  border-left-color: var(--mnav-marrom);
}
/* Item da pagina atual */
.mnav-links a[aria-current="page"] {
  color: var(--mnav-marrom);
  border-left-color: var(--mnav-marrom);
}

/* Grupo "Projetos" */
.mnav-group-label {
  padding: 15px 24px 8px;
  color: #9a9a9a;
  font-family: "SourceSans3-SemiBold", sans-serif;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.mnav-links .mnav-sub {
  padding-left: 16px;
  font-size: 17px;
}

/* Trava o scroll do fundo com o drawer aberto */
body.mnav-lock {
  overflow: hidden;
}

/* ============================================================
   MOBILE
   ============================================================ */
@media (max-width: 900px) {
  /* Esconde o menu horizontal e mostra o hamburguer */
  .header .menu {
    display: none !important;
  }
  .mnav-toggle {
    display: flex;
  }

  /* O padding de 120px do desktop nao cabe no celular */
  .header {
    padding-left: 20px !important;
    padding-right: 12px !important;
  }
}

@media (max-width: 480px) {
  .header {
    padding-left: 14px !important;
    padding-right: 8px !important;
  }
}

/* Se o JS nao rodar, o menu original continua visivel */
.no-js .header .menu {
  display: flex !important;
}